While engineering has put us on the road to a healthier planet, many battles are still left to fight. In your essay, you'll be looking at one of the leading causes of death throughout the world and thinking about how engineers are working to protect us, now and in the future. To get you started we've found several websites that provide basic information about heart disease, stroke, influenza (and other lower respiratory infections), emphysema (or COPD), and diarrhea.